Holder for sample containers



FIG. 1 is an end, top and side perspective view of a holder for sample containers showing our new design with the opposite side and end being identical; and,

FIG. 2 is a bottom plan view of the holder of FIG. 1.

The broken lines are included for the purpose of illustrating portions of the holder for sample containers that forms no part of the claimed design. 

The ornamental design for holder for sample containers, as shown and described. 